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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "DOMSVGStringList.h"
#include "mozilla/dom/SVGStringListBinding.h"
#include "mozilla/dom/SVGTests.h"
#include "nsError.h"
#include "nsCOMPtr.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsQueryObject.h"
#include <algorithm>
// See the architecture comment in this file's header.
namespace mozilla {
using namespace dom;
static inline
nsSVGAttrTearoffTable<SVGStringList, DOMSVGStringList>&
SVGStringListTearoffTable()
{
static nsSVGAttrTearoffTable<SVGStringList, DOMSVGStringList>
sSVGStringListTearoffTable;
return sSVGStringListTearoffTable;
}
NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGStringList, mElement)
NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGStringList)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGStringList)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGStringList)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
//----------------------------------------------------------------------
// Helper class: AutoChangeStringListNotifier
// Stack-based helper class to pair calls to WillChangeStringListList and
// DidChangeStringListList.
class MOZ_RAII AutoChangeStringListNotifier
{
public:
explicit AutoChangeStringListNotifier(DOMSVGStringList* aStringList MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: mStringList(aStringList)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
MOZ_ASSERT(mStringList, "Expecting non-null stringList");
mEmptyOrOldValue =
mStringList->mElement->WillChangeStringList(mStringList->mIsConditionalProcessingAttribute,
mStringList->mAttrEnum);
}
~AutoChangeStringListNotifier()
{
mStringList->mElement->DidChangeStringList(mStringList->mIsConditionalProcessingAttribute,
mStringList->mAttrEnum, mEmptyOrOldValue);
}
private:
DOMSVGStringList* const mStringList;
nsAttrValue mEmptyOrOldValue;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
/* static */ already_AddRefed<DOMSVGStringList>
DOMSVGStringList::GetDOMWrapper(SVGStringList *aList,
nsSVGElement *aElement,
bool aIsConditionalProcessingAttribute,
uint8_t aAttrEnum)
{
RefPtr<DOMSVGStringList> wrapper =
SVGStringListTearoffTable().GetTearoff(aList);
if (!wrapper) {
wrapper = new DOMSVGStringList(aElement,
aIsConditionalProcessingAttribute,
aAttrEnum);
SVGStringListTearoffTable().AddTearoff(aList, wrapper);
}
return wrapper.forget();
}
DOMSVGStringList::~DOMSVGStringList()
{
// Script no longer has any references to us.
SVGStringListTearoffTable().RemoveTearoff(&InternalList());
}
/* virtual */ JSObject*
DOMSVGStringList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGStringListBinding::Wrap(aCx, this, aGivenProto);
}
// ----------------------------------------------------------------------------
// SVGStringList implementation:
uint32_t
DOMSVGStringList::NumberOfItems() const
{
return InternalList().Length();
}
uint32_t
DOMSVGStringList::Length() const
{
return NumberOfItems();
}
void
DOMSVGStringList::Clear()
{
if (InternalList().IsExplicitlySet()) {
AutoChangeStringListNotifier notifier(this);
InternalList().Clear();
}
}
void
DOMSVGStringList::Initialize(const nsAString& aNewItem, nsAString& aRetval,
ErrorResult& aRv)
{
if (InternalList().IsExplicitlySet()) {
InternalList().Clear();
}
InsertItemBefore(aNewItem, 0, aRetval, aRv);
}
void
DOMSVGStringList::GetItem(uint32_t aIndex, nsAString& aRetval, ErrorResult& aRv)
{
bool found;
IndexedGetter(aIndex, found, aRetval);
if (!found) {
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
}
}
void
DOMSVGStringList::IndexedGetter(uint32_t aIndex, bool& aFound,
nsAString& aRetval)
{
aFound = aIndex < InternalList().Length();
if (aFound) {
aRetval = InternalList()[aIndex];
}
}
void
DOMSVGStringList::InsertItemBefore(const nsAString& aNewItem, uint32_t aIndex,
nsAString& aRetval, ErrorResult& aRv)
{
if (aNewItem.IsEmpty()) {
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
return;
}
aIndex = std::min(aIndex, InternalList().Length());
// Ensure we have enough memory so we can avoid complex error handling below:
if (!InternalList().SetCapacity(InternalList().Length() + 1)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
AutoChangeStringListNotifier notifier(this);
InternalList().InsertItem(aIndex, aNewItem);
aRetval = aNewItem;
}
void
DOMSVGStringList::ReplaceItem(const nsAString& aNewItem, uint32_t aIndex,
nsAString& aRetval, ErrorResult& aRv)
{
if (aNewItem.IsEmpty()) {
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
return;
}
if (aIndex >= InternalList().Length()) {
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
return;
}
aRetval = InternalList()[aIndex];
AutoChangeStringListNotifier notifier(this);
InternalList().ReplaceItem(aIndex, aNewItem);
}
void
DOMSVGStringList::RemoveItem(uint32_t aIndex, nsAString& aRetval,
ErrorResult& aRv)
{
if (aIndex >= InternalList().Length()) {
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
return;
}
AutoChangeStringListNotifier notifier(this);
InternalList().RemoveItem(aIndex);
}
void
DOMSVGStringList::AppendItem(const nsAString& aNewItem, nsAString& aRetval,
ErrorResult& aRv)
{
InsertItemBefore(aNewItem, InternalList().Length(), aRetval, aRv);
}
SVGStringList &
DOMSVGStringList::InternalList() const
{
if (mIsConditionalProcessingAttribute) {
nsCOMPtr<dom::SVGTests> tests = do_QueryObject(mElement.get());
return tests->mStringListAttributes[mAttrEnum];
}
return mElement->GetStringListInfo().mStringLists[mAttrEnum];
}
} // namespace mozilla
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